Automatic openers can be used to provide ventilation while you are away - just to set and forget. These units automatically open and close in response to climatic conditions.
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The louvre vents are available with manual or automatic openers. Extra side ventilation can be provided by fitting Louvre vents at staging height.
When used in conjunction with roof vents and Ventaccess panels, healthy air will be able to circulate to all levels of your greenhouse.
Increased roof ventilation can be provided for most models by ordering additional roof vents at the same time as you order your greenhouse.
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Humid and stagnant air can cause condensation and develop disease and mould in plants.

By adding a louvre vent opener to your louvre fresh air is automatically drawn in when it is needed and encouraged to circulate from different levels.
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Discreet when open and effective when closed, these roller blinds fit within each glazing section, providing shade to easily damaged plants and vegetables.
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To eradicate the need for more than one barrel or outlet, a traverse pipe is placed along the rear of the greenhouse terminating into a T junction which connects both gutters to one outlet. This in turn allows the water to be carried from both gutters into a single point such as a barrel or grid.
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An extra single door can be useful if your garden is small and you need access from both ends of your greenhouse, it will also aid ventilation during the hot summer months.


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The Alton Cold Frame is ideal for hardening plants, sowing seeds in overwintering perennials.
It features toughened safety glass, variable ventilation level settings, and the added benefit of purpose designed concrete base kerbs, which are impervious to frost and water.

It is also available is designed concrete base kerbs, which are also impervious to frost and water.

Size:5ft 2 1/2in x 3ft 6 1/4in
Front Height: 1ft 4 1/4in
Back Height: 1ft 9 1/2in

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